Final answer:
fMRI offers higher spatial resolution, lower cost, and no use of radioactive tracers when compared to PET, but it does not have better temporal resolution than PET.
Step-by-step explanation:
The question refers to the comparative advantages of functional magnetic resonance imaging (fMRI) in contrast to positron emission tomography (PET). While fMRI does indeed offer higher spatial resolution, lower cost, and eliminates the use of radioactive tracers, it does not provide better temporal resolution than PET. Temporal resolution refers to the precision of a measurement with respect to time. PET has the advantage of higher temporal resolution due to the direct detection of radioactivity after the tracer is injected, which makes it possible to track dynamic processes in real-time.